Drivers: hv: kvp: move poll_channel() to hyperv_vmbus.h

Move poll_channel() to hyperv_vmbus.h and make it inline and rename it to hv_poll_channel() so it can be reused
in other hv_util modules.
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: NAlex Ng <alexng@microsoft.com>
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hv/hv_kvp.c

@@ -128,17 +128,6 @@ kvp_work_func(struct work_struct *dummy)
 	kvp_respond_to_host(NULL, HV_E_FAIL);
 }
 
-static void poll_channel(struct vmbus_channel *channel)
-{
-	if (channel->target_cpu != smp_processor_id())
-		smp_call_function_single(channel->target_cpu,
-					 hv_kvp_onchannelcallback,
-					 channel, true);
-	else
-		hv_kvp_onchannelcallback(channel);
-}
-
-
 static int kvp_handle_handshake(struct hv_kvp_msg *msg)
 {
 	int ret = 1;
@@ -166,8 +155,8 @@ static int kvp_handle_handshake(struct hv_kvp_msg *msg)
 		pr_info("KVP: user-mode registering done.\n");
 		kvp_register(dm_reg_value);
 		kvp_transaction.active = false;
-		if (kvp_transaction.kvp_context)
-			poll_channel(kvp_transaction.kvp_context);
+		hv_poll_channel(kvp_transaction.kvp_context,
+				hv_kvp_onchannelcallback);
 	}
 	return ret;
 }
@@ -587,7 +576,7 @@ kvp_respond_to_host(struct hv_kvp_msg *msg_to_host, int error)
 
 	vmbus_sendpacket(channel, recv_buffer, buf_len, req_id,
 				VM_PKT_DATA_INBAND, 0);
-	poll_channel(channel);
+	hv_poll_channel(channel, hv_kvp_onchannelcallback);
 }
 
 /*

drivers/hv/hyperv_vmbus.h

@@ -742,5 +742,17 @@ int hv_fcopy_init(struct hv_util_service *);
 void hv_fcopy_deinit(void);
 void hv_fcopy_onchannelcallback(void *);
 
+static inline void hv_poll_channel(struct vmbus_channel *channel,
+				   void (*cb)(void *))
+{
+	if (!channel)
+		return;
+
+	if (channel->target_cpu != smp_processor_id())
+		smp_call_function_single(channel->target_cpu,
+					 cb, channel, true);
+	else
+		cb(channel);
+}
 
 #endif /* _HYPERV_VMBUS_H */